Type-writing machine.



Noi 739,576, PATEN'IED SEPT. 22, 1903.

W. J. BARRON & H. W. MER-RITT.

TYPE WRITING MACHINE.

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No. 739,576. PATENTED' SEPT. 22, 1903.

W. J. BARRONG: H. w. MERRITT.

LTYPE WRITING MACHINE.

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MW THEIR ATTEIHNE Y NITED, STATES Patented September 22, 1903.

PATENT FFICE.

\VALTER J. BARRON, OF BROOKLYN, NEW YORK, AND HENRY W. MERRITT,

OF SPRINGFIELD, MASSACHUSETTS, ASSIGNORS TO DENSMORE TYPE- VVRITER COMPANY, OF SYRACUSE, NEW YORK, A CORPORATION OF NEN YORK.

SPECIFICATION forming part of Letters Patent No. 739,576, dated September 22, 1903.

Original application filed February 6 1902, Serial No 92.839. Divided and this application filed June 3, 1902. Serial No. 110,043. (No model.)

Our invention relates to printing-point-indicating mechanism for type writing machines; and the object of our invention is to provide simple and efficient automaticallyoperated mechanism of the character specilied; and to these and other ends, which will hereinafter appear, our invention consists in the constructions,arrangements, and combinations of parts to be hereinafter. described, and particularly pointed out in the appended claims. In the accompanying drawings, wherein like reference characters designate like parts in the various views and wherein parts have been omitted or broken away, Figure l is a vertical sectional view of one form of typewriting machine embodying our invention, the section being taken from front to rear of the machine. Fig. 2 is a detail transverse sectional view of the platen carriage and frame, together with the printing-point indicator, the parts being shown in their normal positions. Fig. 3 is a like view of the same, showing the platen turned to expose the writing. Fig. 4 is a front view of the same.

We have shown our invention applied to a Densmore type writing machine; but it should be understood that the invention may be applied to other characters of type-writing machines.

1 designates the main frame of the machine; 5 2, the usual top plate, and 3 the key-levers,

which are connected by links 4 in a suitable manner to actuate the type-bars 5, which are pivoted to hangers 6, secured to the top plate 2. Each of the key-levers 3 is provided with the usual finger-key '7 and with a hook 8, which bears upon a transverse universal bar 9, that has a rearwardly-extending arm at each end, which is pivoted to the frame of the machine at 10.

Pivoted to the universal bar 9 at 11 is a link 12, preferably made of two parts, which may be adj ustably united by screw-threaded connections 13. The upper end of this link 12 is provided with an eye 14, that engages a notched portion 15 of an arm 16, which is preferably in the form of a screw that extends through a threaded hole in a depending stud 17 of the dog-rocker, whereby the said arm may be adjusted to bring the inner end there of closer to or to move it farther from the pivotal center of the rocker in order to vary or regulate the throw imparted to the rocker and the feed-dogs carried thereby. The adjustment 13 enables the link 12 to be lengthened or shortened in accordance with the adj ust- 7o ment of the arm 16. The feeddogs 1S 18 and their rocker 19 after actuation are returned to normal position by a spring 20, which is suitably connected at one end to -an arm 20 on the rocker and at its other end to a fixed arm 21 on the machine-frame. The feeddogs 18 and 1S cooperate with a feed-wheel 22, which is secured to a sleeve 23, that surrounds and is loosely carried upon a shaft 24 and is prevented from moving longitudinally 8o thereon in one direction by a sleeve 23 which is secured to the shaft 24 by a set-screw.

The shaft 24 has cone-bearings at its ends, which cooperate with antifriction-balls 24, which revolve in circular raceways. One raceway is formed in a bracket 24", that is secured to the top plate 2 of the machine, and the other raceway is formed in a screwthreaded adjustable plug 24, that takes into a threaded opening in the bracket-arm 24 which forms part of the bracket 24. By these means an efficient ball-bearing support is provided for the shaft 24, and the plug 24 may be turned by a screw-driver (a slot being provided in the plug for this purpose) to compensate for any Wear that may take place in the balls or the bearings.

A feed-pinion 29 is secured to the forward end of the shaft 24 and is operatively connected to the escapementwheel 22 and meshes with a feed-rack 43, carried by the carriage-truck, so that a movement of the feed-dog will permit a step by step of the escapement-wheel and permit the carriage to be moved in the direction of its feed in the usual manner by a carriage-spring. (Not shown.)

The feedrack 43 is mounted upon arms 57, that project from a rock-shaft 58, to which is secured a leaf-spring 59, the free end of which bears against a portion of the carriage, as shown at 60, in order to maintain the feedrack 43 normally in engagement with its cooperating feed-pinion 29. The rock-shaft 58 is likewise provided with a lug 61, which is bifurcated at 62, so as to provide stops 63,

that cooperate with a fixed pin 64, carried upon the carriage in order to limit the oscillation of the rock-shaft.

The rock-shaft 58 has a finger-piece or arm 65 secured to one end thereof, preferably the left-hand end, so that a depression of this finger-piece or arm 65 will rock the shaft 58,

thus disengaging the feed-rack 43 from its pinion 29 to permit the carriage to.be freely moved ineither direction.

In the ordinary Densinore machine the paper-carriage as an entirety comprises three distinct members-via, a frame carrying the platen, a carriage in which the platen-frame is mounted or supported, and a truck or frame that carries the feed-rack-and hereinafter these parts will generally be designated, respectively, as the platen frame, the platen-carriage, and the feed-carriage. The feed-carriage comprises a frame 66, in which the rock-shaft 58, that extends substantially from end to end of the frame, is pivoted,

the carriage being guided at the rear by suitable means. (Not shown.)

Projecting forwardly from the feed-carriage frame 66 are eyes 75, Fig. 1, that surround a tubular bearing-sleeve 76 and which may be secured thereto by screws. The sleeve 76 may be of any desired length; but we prefer to extend it substantially throughout the length of the carriage. This tubular bearingsleeve 76 surrounds a traverse-rod 78, which is supported upon arms or standards 79, projecting up from the top plate, and the rod is provided with two parallel longitudinal grooves 80, which receive two sets of anti friction rollers or balls 81 82. It will be observed that the series of balls 81 are arranged in a groove on the top of the rod 78, whereas the series of balls 82 are arranged in a groove 80 on the rear side of the rod, and that the sleeve 7 6 bears against both series of balls.

In order to prevent the feed-carriage from lifting, we provide the sleeve 76 with pins 83, which normally are out ofcontact with the under side oftraverse-rod. When, however, a slight upward movement is given to the carriage, which would tend to displace it, the pins 83 on the sleeve are brought into contact with the traverse-rod and prevent such displacement.

The platen-carriage referred to comprises a four-sided frame made up of end plates 116, a rear bar 117, to which the forks 112 are connected, and front connecting-bars 118 119. The end plates 116 may be provided with slotted bearings 120 for the reception of a shaft 121 of the platen 122 and may likewise be slotted to provide a bearing-surface 123 for antifriction-rollers 124, that are carried by the platen-frame 125, in substantially the same manner as in the well-known Densmore machine. The connecting-bar118, which unites the end plates, is provided with a carriagescale 126, that cooperates with a fixed pointer 127, secured by screws 127 to the shift rod or rail 130. The bar 119 in addition to forming a connecting-bar between the end plates may be grooved, as indicated at 128, to form a trackway for antifriction-rollers 129, that are carried by the shift-rod 130.

The platen-frame may be provided with the usual fixed finger piece 139, by means of which the platen can be turned back to inspect the writing.

It will be seen that the pointer 127, which is carried by the shift-rail 130, is extended rearwardly and is formed with downwardlyprojecting ears 140, that are apertured to receive a pivot 141 and to receive between them ears 142, that project from a printing-point indicator 143. The pivot 141 likewise extends through openings in the ears 142 of the printing-point indicator in order to provide a pivotal bearing therefor. The printing-point indicator is thus carried by. and is movable with the shift rail or rod and is normally maintained in the position indicated in Fig. 3 by a spring 144, which bears at one end upon the indicator and at the other end upon the extension of the pointer 127, which constitutes a bearing for the indicator.

In the normal position of the indicator it extends upwardly between the platen-carriage and platen-frame, it being understood that the bar 145 constitutes a part of the platen-frame. The printing-point indicator is provided with a leaf-spring 146 for purposes which will presently appear. Pivoted to the platen-carriage at 149 are suitable links 147, to which a longitudinal bar 148 is secured. This bar 148 extends substantially throughout thelength of the platen-carriage,and when moved from the position indicated in Fig. 2 of the drawings to that shown in Fig. 3 it bears against the spring 146 of the printing-point indicator and forces the indicator to the printing position. The movement just described of the bar 148 is brought about by swinging the platen-frame. Thus one of the links 147 at one end of the bar 148 is extended and shaped to form a. cam-surface 150, and the platen-frame carries an antitriction roller 1 theindicator moved quickly over against the 151 on a bar 151 Figs. 3 and 4, and which i when the platen-frame is moved from the position indicated in Fig. 2 to that indicated in Fig. 3-bears against the cam-surface 150 of the link and moves the links 147 and the bar 1&8 to the position indicated in Fig. 3, thereby bringing the printing-point indicator to the printing-point; When the parts have attained this position, the antifriction-roller 151 will be seated in a locking-recess 150 in the link to lock the parts controlled thereby against movement.

The bar 148 and the parts connected thereto are restored to normal position by gravity when the platen is lowered, the restoration being assisted by the pressure of the springs 146 and 1 14 of the printing-point indicator. The purpose of interposing the spring 146 between the printing-point indicator and the positively-moved bar 145 is to prevent the printing-point indicator frombeing forced with undue pressure against the paper, especially when a number of sheets are on the platen, as is the casein manifolding. It will be understood that when alarge number of sheets are on the platen the printing-point indicator will be arrested by the paperbefore the actuatingbar 148 has been swung rearwardly to its full extent, and but for the interposed spring 14:6 the bar 148 would likewise be arrested and the pressure of the indicator upon the paper would be apt to tear or injure it or strain the bar 148 it the force employed to turn up the platen-frame were continued after the pointer or indicator came to a hearing on the paper; but it will be seen that in consequence of the employment of the spring 1 16 the bar 148, owing to the yielding of said spring, may continue its rearward motion to the required extent after the indicator has been arrested by the paper and without cansing an undue pressure thereupon by the indicator, the spring flexing readily to accommodate the extra movement of the bar 148.

Owing to the position of the actuating stud or roller 151, it will be observed that the platen-frame maymake almosta quarter of a revolution before the actuating-bar 148 and the pointer are affected, or,in other words, the pointer remains in its normal forward position until the turning up of the platen-frame has almostbeen completed. Bythis construction and arrangement there is no danger of the indicator striking or being caught by any of the paper fingers, guides, or other devices at the front side of the platen-frame, and which would be the case if the indicator were started rearwardly at or about the beginning of the upturning movement of the platenframe. In the machine shown the roller 151 does not strike the actuating link or arm 147 until the lifting-handle 139 has reached a substantially vertical position, and then in the short movement of said handle past the vertical position the bar 118 is swung and paper on the platen.

In the turning-down movement of the platenframe the indicator starts to return to its normal position at the initial swinging of said platen-frame, and by the time the handle 139 has again arrived at the vertical position the pointer has fully returned to its normal position and the platen-frame may be swung down to horizontal working position without danger of any of the devices thereon catching on or colliding with said indicater.

The link 147, which has the cam 150 formed thereon, is upturned to form a hook 147 which automatically engages the bar 145 of the platen-frame when the platen-frame and platen-carriage are swung back together, so as to prevent the platen-frame from dropping away from its platen-carriage. parts are returned to the operative position, the hook will automatically be disengaged, so that the platen-frame may be turned up independent of theplaten-carriage for inspec tion or correction of the work. The locking and unlocking movements of the hook 14'? are controlled by the gravity of the'swinging bar 148, which moves rearwardly to maintain its perpendicular position at the initial upturning movement of the platen-carriage and When the platen-frame, and this movement of said bar causes the point of the hookli'i to swing around the center 149 and over the bar 145,

and thus lock the platen-frame and platencarriage together, so that the platen-frame may not be detached from the platen-carriage as the rearward swinging movement of the latter is continued. When the platen-carriage and the platen-frame are turned down to working position, the bar 148 will swing forwardly and carry the point of the book back from over the top of the bar 145 just before theplaten-frame is restored to normal position, and thereby unlock the same.

The bar 151 heretofore referred to,eXtends. throughoutthe length of the platen-frame and is connected at its ends to arms 153, depending from said frame, and this bar supports,in addition to the antifrict'ion-roller 151, a scale-bar 154, having gradnations 155, and the edge of this scale bar is maintained against the platen by a spring 156. (See Fig.4.)

Certain features shown and described are not claimed herein,but constitute the subjectmatter of separate divisional applications filed herewith.

- l/Vhat we claim as new, and desire to secure by Letters Patent, is-

1. In atype-writing machine, the combination of a swinging platen, a printing-point indicator which is mounted at the front of the machine and is fixed with relation to longitudinal movement of the platen, and means for automatically swinging the indicator toward the rear of the machine to designate the printing-point when the platen is swung back.

IIO

2. In a type-writing machine, the combination of a swinging platen, a printing-point indicator which is mounted at the front of the machine and which is spring-pressed and normally maintained in a substantially upright position by its spring and means for automatically swinging the indicator toward the rear of the machine to designate the printing-point when the platen is swung back.

3. In a type-writing machine, the combination of a swinging platen-frame, a printingpoint indicator mounted at the front of the machine, positively-moved means controlled by the platen-frame for automatically swinging the indicator toward the rear of the machine to designate the printing-point when the platen-frame is swung back, and a spring interposed between said positively-moved means and the indicator.

4. In atype-writing machine, the combination of a swinging platen-frame, a printingpoint indicator which is mounted at the front of the machine and is fixed with relation to the longitudinal movement of the platen, positively-moved means controlled by the platen-frame for automatically swinging the indicator toward the rear of the machine to designate the printingpoint when the platen-frame is swung back and means for automatically locking the positively-moved means when the platen-frame is swung back.

5. Inatype-writing-machine, the combination of a swinging platen, a printing-point indicator, positively-operated means for moving the indicator to the printing-point when the platen is swung back and a spring interposed between the indicator and the positively-operated means.

6. In a type-writing machine, the combination of a platen-carriage, a swinging platenframe carried thereby, a printing-point indicator, a transversely-movable bar carried by the platen-carriage and adapted to cooperate Withthe indicator at any point in the travel of the carriage, and means carried by the platen-frame which cooperate with the said bar to move it and thus effect a movement of the indicator to the printing-point.

7. In a type-writing machine, the combination of a platen-carriage, a swinging platenframe carried thereby, a printing-point indicator pivoted at the front of the machine and projected upwardly and between the platen frame and carriage, a spring for restoring the indicator to its normal or inoperative position, a transversely-movable bar carried by the platen-carriage and adapted to cooperate with the indicator at any point in the travel of the carriage to move the indicator back to the printing-point and means carried by the platen-frame which cooperate with the said bar to move it and thus efiect a movement of the indicator to the printing-point.

8. In a type-writing machine, the combination of a platen-carriage, a swinging platenframe carried thereby, a printing-point indicator pivoted to the framing of the machine and projected upwardly and between the platen frame and carriage, a spring for restoring the indicator to its normal position, a transversely movable bar carried by the platen-carriage and adapted to cooperate with the indicator at any point in the travel of the carriage to move the indicatorback to the printing-point, a spring carried by the indicator and against which the bar is adapted to contact when the indicator is being moved to the printing-point, means carried by the platen-frame which cooperates with the said bar to move it and thus effect a movement of the indicator to the printing- -point, and means for automatically locking the bar when it has been moved to the operative position.

9. In a type-writing machine, the combination of a transversely-movable platen-carriage, a shift-rod therefor, a swinging platen carried by said carriage, a printing-point indicator carried by said shift-rod, and means for automatically moving said printing-point indicator during the swinging of the platen.

10. In a type-writing machine, the combination of a transversely-movable platen-carriage, a platen-frame which swings in said platen-carriage, a shift-rod for the platen-carriage, a printing-point indicator pivoted to said shift-rod, and means controlled by the swinging movement of said platenframe for moving the printing-point indicator to the operative position.

11. In a type-writing machine, the combination of a transversely-movable platen-carriage, a shift-rod therefor, a printing-point indicator pivoted to said shift-rod, and means controlled by the swinging movement of the platen for moving the indicator to the printing-point irrespective of the position of the platen-carriage.

Signed in the borough of Manhattan, city of New York, in the county of New York and State of New York, this 2d day of June, A. D. 1902.

Witnesses:

K. V. DONOVAN, E. M. WELLS. 

